Feed means for oil-burning apparatus.



G. W'. BOTHWELL.

FEED MEANS roa OIL BURNING APPARATUS. APPLICATION FILED JUNE 9,-1913.

" 1,1 16,790. Patented Nov. 10, 19M

f H A Geog? WTBJfiweZZ.

THE NORRIS PETERS C0,. PHOTO'LITHLZ. WASHINGTON O- Cv GEORGE w.-BOTI-IWE'LL, or oN'rAR'Io, .oALIFoRNIAQ FEED MEANS For. o n-nuniiiiveAPPARATUSQ To all whom it may concern Beit known that I, G ORG BornWELL, a citizenfof the United-Statea'residing at Ontario, in the .countyof San Bernardino and StateofCalifornia, have invented 'anew and usefulFeed Means for Oil-Burning Apparatus, of which the following is aspecification.

This invention relates to an apparatus for burning oil for heatingorchards or for other purposes, and the main object of the invention isto provide an apparatus which will require the minimum'of care or oversight during its operation.

The'invention relates to oil burningapparatus of the class wherein oilinan airtight tank is supplied gradually by allowing air to enter thetank to displace the oil, on the principle of a fountain feed. In suchfountain feed apparatus a quantity of oil is allowed to escape instarting before sufficient vacuum is obtained in the tank to sustain thecolumn of oil in the tank, and oneobject of the invention in thisconnection is to provide means forcollecting and holding the oil"escaping in thismannerand supplying it gradually to the burner. I

A further obj ect'of the invention is to provide convenient meanswhereby the apparatus may be regulated for effective operation and thesupply of oil may then be turned on and off without disturbing theregulation.

Another object of the invention is to provide for cutting off theconnection between the tank and the fountain feed means when.

the burner is not being used, so as to maintain a condition. of vacuiunin the supply embodiment of the feed controlling device.

tank. v v p Other objects of the invention will appear hereinafter.

The accompanying drawings illustrate an my invention, and referringthereto:

2 Figure 1 is a vertical section of the apparatus, the supply tank beingshown partly in elevation. Fig. 2 is a side elevation of Fig. 8 is aplan view of the feed devices, portions of th tank being shown insection.

l designates a supply tank having a closure 2 at the top which isadapted to tightly close the tankduring operation, and is only removedfor the filling of thetank. Said tank 1 is preferablysupported on a-reservoir 3, formed as an opentopped pan Specification of LettersPatent. Y P t nt d v 1 1 14. Application filed June 9, 19-13. Serialmywasas.

downwardly from the tank 1. An outlet p p t leads tram the 1Wr part ojtank 1 the outletpipe 5'to a 'tee 7,one branch of f I to a valve 6controlling communication from adapted to'fit withina flange 4,extending which is connected through a regulating valve 8 to afittingf)having an outlet con- I I nection 10 to the reservoir 3. A siphon tube v11 extends upwardlyfrom the tee 7 from a point below the to-p of thereservoir and over and downwardly into the fitting 9,be1ng'suffic'iently'-smaller'than the fitting. 9

to permit air'to enter fitting 9'around the siphon tube 11. g Reservoir3 has an outlet pipe 12 communicating'. with any suitable heater, forexamplawith a-heater of the typeshown in myapplicatio-n, "Serial No.763,438, filed April 24, 1918,comprising heater casing 14 having a stack15 "and provided with'a' vaporizing tube 16 within the casing andv anoutlet 17 for directing a jet of vapor into the casing, [saidcasingfhaving an air inlet 18 through which extendsthe supply pipe 19for the heater. Said supply pipe 19 communicates throughaseal consistingof a downward and upwardbend 20 in thepipe 12 aforesaid, the outer endof said pipe 12 being connected to atee 22 which. is connected to thesupplypipe 19 for the heater,

anda stand pipe being connected to said tee and extending upwardly andbeing open at its upper end to-serve as a vent as describedin my saidapplication. In place of this'form of heater, however, any other form ofheater may be used which is adapted to operate with a small pressure ofoil.

In order to facilitatedisconnection of the heater from the supplytank,pipe 12 is preferably connected to the] reservoir 3 by a couplingconsisting of ascrew sleeve 25'having right and'left screwthreadsengaging respectively withascrew thread on the pipe 12 andwith ascrew thread on a nipple 26 screwing into the sideofthereservoir 3.

The operation ofthis form of my invention. is as follows: Tank; 1 isfilled withoil,

the closure 2 being removed for that purpose and then tightly'replaced,so as to prevent air from entering [the tank during the oper-,

ation. Whenit is desired to use the burner,

the valve 6-is opened wide andthe valve 8 having been previously, opened]to "proper extentfor operation of the burner, oil flows down throughthe fittings 5, 6, 7, Sand 9 into the reservoir 3,, the line of fittingsaforesaid being inclined as shown in Fig. 2 to facilitate passage of theoil in this manner. Any excess of oil in starting, due to a largeropening of the valve 6 than of the valve 8 is carried off through thetube 11 and dischargedinto the fitting 9, passing thence into thereservoir 3. Said reservoir is of sufficient capacity to hold all of theoil which escapes during the production of a vacuum in the upper part oftank 1, sufiicient to sustain the remaining column of oil in the tankand the oil thus fiowin into reservoir 3 flows radu cover the lower partof the outlet. of the shut off valve 6 so that the device acts as afountain feed, the air for displacing the air in the supply tank 1,enteringthrough the tube 11 and passing up through the valve 6 wheneverthe oil in the reservoir 3 and fittings 7, 8 and 9 falls below the levelof the inlet of tube 11 into tee '7, such inlet being; indicated by adotted line a in Fig. 2. vVhen this occurs a small quantity of the oilis discharged, enough to accumulate in and fill the provision of theshut off valve 6 be.-

tween the tank and the "air inlet for the founta1nfeed. I have foundthat in applymg a fountaln feed to a tank of this characs ter especiallywhen the same is used in the open air in connection with orchardheaters, the fluctuations of temperature cause sufficient dilatation andcontraction of the gases in the upper part of the tank 1 to interferewith the preservation of an effective vacuum inthe upper part of saidtank, the vacuum being reduced in the expansion of the gas and not beingfully restored in contraction, due presumably to gradual evaporation ofgas into the space above the liquid in the tankby reason of the lowpressure therein and the heating of the liquid and this gas not beingfully absorbed when the liquid again 00015. By closing the valve 6tightly when the burner is not in use, I am enabled to retain acondition of vacuum indefinitely ;6O

in the tank 1, so that when the valve'fi is immediately in normal'mannerwithout any sudden outrush of oil due to lack of vacuum.

in the tank.

What I claim is:

In an oilburning apparatus, a feed means comprising a tank, a reservoirbelow the tank, an outlet connection leading from said tank to saidreservoir and provided with two valves, and having an air inlet openingin its top. between one of said valves and said reservoir, and an airinlet tube extending above said air inlet openingand communica ting withsaid outlet connection between sald valves, at a pointvbelow the top ofthe reservoir.

In. testimony whereof,.I have hereunto set my hand at Los Angeles,California this 29th day of May, 1913. l

GEORGE w. BOTHWELL.

i Copies of this patent may be obtained for five cents each,-tbyaddressing the f Commissioner of Iatents WashingtdmDJGP-

